How EIP-712 Enables Gas-Efficient Offchain OTC Order Signing and Settlement

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Traditional onchain OTC order systems require a blockchain transaction for every quote, wasting gas even when offers go unfilled. A more efficient model, illustrated through the Typelex case study, allows market makers to create and sign structured orders offchain using the EIP-712 standard. The signed order is only submitted to the blockchain when both parties are ready to settle, meaning unused quotes never consume gas or occupy contract storage. The architecture incorporates offchain maker signatures, onchain verification, nonce-based replay protection, and support for both standard and smart-contract wallets. This approach is particularly suited to RFQ protocols and DAO treasury operations where multiple competing quotes are common but only one is ultimately executed.

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